api & web: merge base queue ui & api updates

api/src/core/api.js

@@ -8,18 +8,19 @@ import jwt from "../security/jwt.js";
 import stream from "../stream/stream.js";
 import match from "../processing/match.js";
 
-import { env, isCluster, setTunnelPort } from "../config.js";
+import { env } from "../config.js";
 import { extract } from "../processing/url.js";
-import { Green, Bright, Cyan } from "../misc/console-text.js";
+import { Bright, Cyan } from "../misc/console-text.js";
 import { hashHmac } from "../security/secrets.js";
 import { createStore } from "../store/redis-ratelimit.js";
 import { randomizeCiphers } from "../misc/randomize-ciphers.js";
 import { verifyTurnstileToken } from "../security/turnstile.js";
 import { friendlyServiceName } from "../processing/service-alias.js";
-import { verifyStream, getInternalStream } from "../stream/manage.js";
+import { verifyStream } from "../stream/manage.js";
 import { createResponse, normalizeRequest, getIP } from "../processing/request.js";
 import * as APIKeys from "../security/api-keys.js";
 import * as Cookies from "../processing/cookie/manager.js";
+import { setupTunnelHandler } from "./itunnel.js";
 
 const git = {
     branch: await getBranch(),
@@ -263,6 +264,15 @@ export const runAPI = async (express, app, __dirname, isPrimary = true) => {
         }
     })
 
+    app.use('/tunnel', cors({
+        methods: ['GET'],
+        exposedHeaders: [
+            'Estimated-Content-Length',
+            'Content-Disposition'
+        ],
+        ...corsConfig,
+    }));
+
     app.get('/tunnel', apiTunnelLimiter, async (req, res) => {
         const id = String(req.query.id);
         const exp = String(req.query.exp);
@@ -292,31 +302,7 @@ export const runAPI = async (express, app, __dirname, isPrimary = true) => {
         }
 
         return stream(res, streamInfo);
-    })
-
-    const itunnelHandler = (req, res) => {
-        if (!req.ip.endsWith('127.0.0.1')) {
-            return res.sendStatus(403);
-        }
-
-        if (String(req.query.id).length !== 21) {
-            return res.sendStatus(400);
-        }
-
-        const streamInfo = getInternalStream(req.query.id);
-        if (!streamInfo) {
-            return res.sendStatus(404);
-        }
-
-        streamInfo.headers = new Map([
-            ...(streamInfo.headers || []),
-            ...Object.entries(req.headers)
-        ]);
-
-        return stream(res, { type: 'internal', ...streamInfo });
-    };
-
-    app.get('/itunnel', itunnelHandler);
+    });
 
     app.get('/', (_, res) => {
         res.type('json');
@@ -378,17 +364,5 @@ export const runAPI = async (express, app, __dirname, isPrimary = true) => {
         }
     });
 
-    if (isCluster) {
-        const istreamer = express();
-        istreamer.get('/itunnel', itunnelHandler);
-        const server = istreamer.listen({
-            port: 0,
-            host: '127.0.0.1',
-            exclusive: true
-        }, () => {
-            const { port } = server.address();
-            console.log(`${Green('[✓]')} cobalt sub-instance running on 127.0.0.1:${port}`);
-            setTunnelPort(port);
-        });
-    }
+    setupTunnelHandler();
 }

api/src/core/itunnel.js

@@ -0,0 +1,61 @@
+import stream from "../stream/stream.js";
+import { getInternalTunnel } from "../stream/manage.js";
+import { setTunnelPort } from "../config.js";
+import { Green } from "../misc/console-text.js";
+import express from "express";
+
+const validateTunnel = (req, res) => {
+    if (!req.ip.endsWith('127.0.0.1')) {
+        res.sendStatus(403);
+        return;
+    }
+
+    if (String(req.query.id).length !== 21) {
+        res.sendStatus(400);
+        return;
+    }
+
+    const streamInfo = getInternalTunnel(req.query.id);
+    if (!streamInfo) {
+        res.sendStatus(404);
+        return;
+    }
+
+    return streamInfo;
+}
+
+const streamTunnel = (req, res) => {
+    const streamInfo = validateTunnel(req, res);
+    if (!streamInfo) {
+        return;
+    }
+
+    streamInfo.headers = new Map([
+        ...(streamInfo.headers || []),
+        ...Object.entries(req.headers)
+    ]);
+
+    return stream(res, { type: 'internal', ...streamInfo });
+}
+
+export const setupTunnelHandler = () => {
+    const tunnelHandler = express();
+
+    tunnelHandler.get('/itunnel', streamTunnel);
+
+    // fallback
+    tunnelHandler.use((_, res) => res.sendStatus(400));
+    // error handler
+    tunnelHandler.use((_, __, res, ____) => res.socket.end());
+
+
+    const server = tunnelHandler.listen({
+        port: 0,
+        host: '127.0.0.1',
+        exclusive: true
+    }, () => {
+        const { port } = server.address();
+        console.log(`${Green('[✓]')} internal tunnel handler running on 127.0.0.1:${port}`);
+        setTunnelPort(port);
+    });
+}

api/src/processing/services/bilibili.js

@@ -58,7 +58,8 @@ async function com_download(id) {
     return {
         urls: [video.baseUrl, audio.baseUrl],
         audioFilename: `bilibili_${id}_audio`,
-        filename: `bilibili_${id}_${video.width}x${video.height}.mp4`
+        filename: `bilibili_${id}_${video.width}x${video.height}.mp4`,
+        isHLS: true
     };
 }
 

api/src/stream/internal-hls.js

@@ -1,5 +1,6 @@
 import HLS from "hls-parser";
 import { createInternalStream } from "./manage.js";
+import { request } from "undici";
 
 function getURL(url) {
     try {
@@ -55,8 +56,11 @@ function transformMediaPlaylist(streamInfo, hlsPlaylist) {
 
 const HLS_MIME_TYPES = ["application/vnd.apple.mpegurl", "audio/mpegurl", "application/x-mpegURL"];
 
-export function isHlsResponse (req) {
-    return HLS_MIME_TYPES.includes(req.headers['content-type']);
+export function isHlsResponse(req, streamInfo) {
+    return HLS_MIME_TYPES.includes(req.headers['content-type'])
+        // bluesky's cdn responds with wrong content-type for the hls playlist,
+        // so we enforce it here until they fix it
+        || (streamInfo.service === 'bsky' && streamInfo.url.endsWith('.m3u8'));
 }
 
 export async function handleHlsPlaylist(streamInfo, req, res) {
@@ -71,3 +75,59 @@ export async function handleHlsPlaylist(streamInfo, req, res) {
 
     res.send(hlsPlaylist);
 }
+
+async function getSegmentSize(url, config) {
+    const segmentResponse = await request(url, {
+        ...config,
+        throwOnError: true
+    });
+
+    if (segmentResponse.headers['content-length']) {
+        segmentResponse.body.dump();
+        return +segmentResponse.headers['content-length'];
+    }
+
+    // if the response does not have a content-length
+    // header, we have to compute it ourselves
+    let size = 0;
+
+    for await (const data of segmentResponse.body) {
+        size += data.length;
+    }
+
+    return size;
+}
+
+export async function probeInternalHLSTunnel(streamInfo) {
+    const { url, headers, dispatcher, signal } = streamInfo;
+
+    // remove all falsy headers
+    Object.keys(headers).forEach(key => {
+        if (!headers[key]) delete headers[key];
+    });
+
+    const config = { headers, dispatcher, signal, maxRedirections: 16 };
+
+    const manifestResponse = await fetch(url, config);
+
+    const manifest = HLS.parse(await manifestResponse.text());
+    if (manifest.segments.length === 0)
+        return -1;
+
+    const segmentSamples = await Promise.all(
+        Array(5).fill().map(async () => {
+            const manifestIdx = Math.floor(Math.random() * manifest.segments.length);
+            const randomSegment = manifest.segments[manifestIdx];
+            if (!randomSegment.uri)
+                throw "segment is missing URI";
+
+            const segmentSize = await getSegmentSize(randomSegment.uri, config) / randomSegment.duration;
+            return segmentSize;
+        })
+    );
+
+    const averageBitrate = segmentSamples.reduce((a, b) => a + b) / segmentSamples.length;
+    const totalDuration = manifest.segments.reduce((acc, segment) => acc + segment.duration, 0);
+
+    return averageBitrate * totalDuration;
+}

api/src/stream/internal.js

@@ -1,7 +1,7 @@
 import { request } from "undici";
 import { Readable } from "node:stream";
 import { closeRequest, getHeaders, pipe } from "./shared.js";
-import { handleHlsPlaylist, isHlsResponse } from "./internal-hls.js";
+import { handleHlsPlaylist, isHlsResponse, probeInternalHLSTunnel } from "./internal-hls.js";
 
 const CHUNK_SIZE = BigInt(8e6); // 8 MB
 const min = (a, b) => a < b ? a : b;
@@ -96,10 +96,7 @@ async function handleGenericStream(streamInfo, res) {
         res.status(fileResponse.statusCode);
         fileResponse.body.on('error', () => {});
 
-        // bluesky's cdn responds with wrong content-type for the hls playlist,
-        // so we enforce it here until they fix it
-        const isHls = isHlsResponse(fileResponse)
-                      || (streamInfo.service === "bsky" && streamInfo.url.endsWith('.m3u8'));
+        const isHls = isHlsResponse(fileResponse, streamInfo);
 
         for (const [ name, value ] of Object.entries(fileResponse.headers)) {
             if (!isHls || name.toLowerCase() !== 'content-length') {
@@ -133,3 +130,40 @@ export function internalStream(streamInfo, res) {
 
     return handleGenericStream(streamInfo, res);
 }
+
+export async function probeInternalTunnel(streamInfo) {
+    try {
+        const signal = AbortSignal.timeout(3000);
+        const headers = {
+            ...Object.fromEntries(streamInfo.headers || []),
+            ...getHeaders(streamInfo.service),
+            host: undefined,
+            range: undefined
+        };
+
+        if (streamInfo.isHLS) {
+            return probeInternalHLSTunnel({
+                ...streamInfo,
+                signal,
+                headers
+            });
+        }
+
+        const response = await request(streamInfo.url, {
+            method: 'HEAD',
+            headers,
+            dispatcher: streamInfo.dispatcher,
+            signal,
+            maxRedirections: 16
+        });
+
+        if (response.statusCode !== 200)
+            throw "status is not 200 OK";
+
+        const size = +response.headers['content-length'];
+        if (isNaN(size))
+            throw "content-length is not a number";
+
+        return size;
+    } catch {}
+}

api/src/stream/manage.js

@@ -68,10 +68,20 @@ export function createStream(obj) {
     return streamLink.toString();
 }
 
-export function getInternalStream(id) {
+export function getInternalTunnel(id) {
     return internalStreamCache.get(id);
 }
 
+export function getInternalTunnelFromURL(url) {
+    url = new URL(url);
+    if (url.hostname !== '127.0.0.1') {
+        return;
+    }
+
+    const id = url.searchParams.get('id');
+    return getInternalTunnel(id);
+}
+
 export function createInternalStream(url, obj = {}) {
     assert(typeof url === 'string');
 
@@ -124,7 +134,7 @@ export function destroyInternalStream(url) {
     const id = url.searchParams.get('id');
 
     if (internalStreamCache.has(id)) {
-        closeRequest(getInternalStream(id)?.controller);
+        closeRequest(getInternalTunnel(id)?.controller);
         internalStreamCache.delete(id);
     }
 }

api/src/stream/shared.js

@@ -1,5 +1,7 @@
 import { genericUserAgent } from "../config.js";
 import { vkClientAgent } from "../processing/services/vk.js";
+import { getInternalTunnelFromURL } from "./manage.js";
+import { probeInternalTunnel } from "./internal.js";
 
 const defaultHeaders = {
     'user-agent': genericUserAgent
@@ -47,3 +49,40 @@ export function pipe(from, to, done) {
 
     from.pipe(to);
 }
+
+export async function estimateTunnelLength(streamInfo, multiplier = 1.1) {
+    let urls = streamInfo.urls;
+    if (!Array.isArray(urls)) {
+        urls = [ urls ];
+    }
+
+    const internalTunnels = urls.map(getInternalTunnelFromURL);
+    if (internalTunnels.some(t => !t))
+        return -1;
+
+    const sizes = await Promise.all(internalTunnels.map(probeInternalTunnel));
+    const estimatedSize = sizes.reduce(
+        // if one of the sizes is missing, let's just make a very
+        // bold guess that it's the same size as the existing one
+        (acc, cur) => cur <= 0 ? acc * 2 : acc + cur,
+        0
+    );
+
+    if (isNaN(estimatedSize) || estimatedSize <= 0) {
+        return -1;
+    }
+
+    return Math.floor(estimatedSize * multiplier);
+}
+
+export function estimateAudioMultiplier(streamInfo) {
+    if (streamInfo.audioFormat === 'wav') {
+        return 1411 / 128;
+    }
+
+    if (streamInfo.audioCopy) {
+        return 1;
+    }
+
+    return streamInfo.audioBitrate / 128;
+}